REINIER DE RIDDER
"The Dutch Knight"
Biography
Reinier de Ridder, also known by his initials RdR, is a Dutch professional mixed martial artist. He currently competes in the Middleweight division of the Ultimate Fighting Championship (UFC). He previously competed in ONE Championship, where he is a former ONE Middleweight World Champion and ONE Light Heavyweight World Champion. De Ridder was the third two-division champion in ONE history, having previously held the middleweight and light heavyweight belts simultaneously. As of October 21, 2025, he is #8 in the UFC middleweight rankings.
WIN BREAKDOWN — MMA
15 total fights · 18% KO rate
SIMILAR FIGHTERS
Same sport — matched first by weight class, then by nationality, with top records filling any gaps.
Dricus Du Plessis
Dricus Du Plessis
24-3-0
Robert Whittaker
Robert Whittaker
19-7-0
Sean Strickland
Sean Strickland
18-7-0
Israel Adesanya
Israel Adesanya
13-6-0
Jared Cannonier
Jared Cannonier
11-10-0
Anthony Hernandez
Anthony Hernandez
10-4-0
Nassourdine Imavov
Nassourdine Imavov
10-2-1
Dawid Kasperski
Dawid Kasperski
23-8-1